Apple has released a firmware update for the mid-2012 MacBook Air. The update attempts to resolve an issue that affects 64 GB and 128 GB models sold between June 2012 and June 2013. Apple says that the problem could lead to data loss. As this is a serious issue, the company has agreed to replace any affected drives that are unable to be updated. If the update installer detects that your drive is one of the models needing to be replaced, it will direct you to a page on Apple’s website that will allow you to obtain a replacement … expand full story